Interconnecting to the CG

1
Interconnecting to the CGE System

• PUCO Technical Conference on Interconnection
• March 9, 2006 - Columbus, OH
• Jim Lemke

2
Where to find Uniform Interconnection Procedure
in CGEs Tariff

• Rate DI (Distribution Interconnection)
• http//www.cinergycge.com/pdfs/ratedi.pdf
• Includes Application Form Interconnection
  Agreements

3
CGE Has Further Simplified Interconnection

• No application or study fees
• One page Agreement for PV lt 10kW
• Separate utility disconnect switch usually not
  required for residential PV
• Available to discuss requirements and options for
  specific projects before an application is made

4
CGE Has Further Simplified Interconnection

• IEEE 1547 Certification
• CGE accepts inverters with UL 1741 listing as
  meeting the testing section in the Technical
  Requirements for lt 300kW
• CGE uses IEEE 1547 as the core of its
  interconnection technical requirements for any DR
  lt 10MW

5
Experience(Since Uniform Procedures Adopted)

• Most applications have been in two categories
• Small photovoltaic
• Net metering
• Smallest 1.3kW Largest 20kW
• Pass screens for simplified interconnection
• Recip engine driven synchronous generator
• Backup with Paralleling Switchgear
• Smallest 600kW Largest 4MW
• Do not pass screens for simplified
  interconnection

6
Small PV Interconnection Approval Process Is Very
Simple

• Application information can be taken over the
  phone
• Name and address
• Inverter manufacturer, model number, rating
• Confirm UL1741 listing
• On site inspection after installation takes
  less than 15 minutes

7
One Page Agreement for PV lt 10 kW
8
Typical Application for gt 300kW

• Diesel or natural gas engine
• Synchronous generator
• Primarily for emergency or back-up power
• Paralleling Switchgear to avoid interruption when
  returning load to utility, but includes
  continuous parallel capability for future
  peak-shave option
• No intention to export power

9
gt300kW Process

• Most projects do not start with an application
  containing a completed interconnection design
• Most projects do start well before application
  with phone call seeking information about
  technical requirements

10
gt300kW Process

• CGE uses IEEE 1547 as the core of its
  interconnection technical requirements for any DR
  lt 10MW
• To complete a design that is compliant with IEEE
  1547, some exchange of information with the
  utility is necessary
• Relative size of DR to utility load
• Transformer winding connections
• Utility reclosing

11
gt300kW Process

• Most of the interconnection issues are worked out
  in an informal process with the Customers
  engineering firm before an application is made
• In most cases so far, no CGE system changes have
  been required to accommodate the DR

12
Impact of IEEE 1547

• Provides a nationally recognized standard that
  supports CGE requirements
• In CGEs experience, most pre-IEEE 1547
  interconnection designs were generally consistent
  with IEEE 1547 therefore, no significant
  changes have occurred

13
Who to Contact About Interconnection

• Mike Koehler
• 513-287-1984 Direct Number
• Mike.Koehler_at_cinergy.com
• Jim Lemke
• 765-454-6196 Direct Number
• Jim.Lemke_at_cinergy.com